The Waves are Rising and Rising (слэш)

“My doctor thinks dual cultivation would help. Sexual dual cultivation.” Nie Mingjue puffs out his now reddened cheeks, “Specifically as the party being penetrated. It — it helps for the energy exchange to be closer to the golden core, apparently.” He clears his throat. “More efficient that way. Theoretically it would have better and faster results than Song of Cleansing.”
Jin Guangyao’s ears are ringing. He’s distantly aware that his mouth is hanging open. He stares at Nie Mingjue, trying to process if he really just said what he thought he said. Slowly, he turns his head to look at Lan Xichen who — yes, Nie Mingjue definitely just said that, because Lan Xichen’s ears are bright red and he’s blinking rapidly, his own jaw dropped.
Nie Mingjue is asking to be fucked in the ass. For medical reasons.
–//–
Three virgins with communication issues attempt to do sex magic. It goes about as well as you might expect.